body {
    margin: 0;
    padding: 0;
    background-color: beige;
}

#header {
    background-color: #eeebe7;
    height: 100px;
    color: #557077;
    text-align: center;
    line-height: 100px;
    font-size: 36px;
    font-weight: bold;
    font-family: 'Microsoft YaHei', sans-serif;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.container {
    background-color: aliceblue;
    height: 300px;
    width: 400px;
    margin: 20px auto 0;
    padding: 15px;
}
.container_bottom {
    background-color: aliceblue;
    height: 200px;
    width: 550px;
    margin: 20px auto 0;
    padding: 15px;
}
table {
    width: 50%;
    border-collapse: collapse;
    margin: 20px auto;
}

table, th, td {
    border: 1px solid black;
}

th, td {
    padding: 10px;
    text-align: left;
}

th {
    background-color: #f2f2f2;
}
